Use your owners manual as a guide in determining which of the fuse box the one under the hood or the other one on the drivers side of the cabin contains the blown fuse that needs replacement. 94-98 7.3L General Powerstroke Discussion. This means you can see the same ones for the brake and taillights. SOMETIMES, the headlights will go off when I set the park brake. Is A Manual Transmission Faster Than An Automatic? Connector in the rear, next to spare tire, for camera and rear lights. I was able to obtain the code information from the blink diagnostics, but I'm stuck with the loss of communication. (Causes & How To Fix), Tail Lights Not Working But Brake Lights Are? VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. If it's not a simple fix I will take it to the dealer when I have time. If the flasher breaks or has any internal issues it can cause the lights to malfunction, or not respond at all when the turn signal lever or hazard light button are pressed . Although if the memory serves Midliner was not a Renault (and Mack) product only. With out a wiring schematic the only alternative I see would be to follow the air lines from the P Brake Knob and it should lead you to a switch unit. Amazon Affiliate Link to Brake Light Switch: https://amzn.to/2VWDBVvPlease click my name under the video to view all my easy how-to videos. Replace missing bumpers with new ones as soon as you can so that you can close out the brake circuit. But when exactly does normal end and problems begin when, Read More Car AC Leaking Water (Causes & Fix)Continue. A brake pedal that is stuck or not closing the switch is another cause for the brake light to stay on or get stuck. Cookie Policy | It might be referred to by several other names, including: The brake light switch should be open when you arent pressing the pedal. It may repeat this sequence several times a second and it may control each wheel differently. The forum is owned and maintained by Watt's Truck Center, Inc. an independent, full service Mack dealer. I was thinking of using ALL steel braided hose, Ive found a manufacturer online that deals in that type hose, but I need to get the correct fitting information which is metric. *light switch OFF all trailer braking lights function normally. If you dont have the knowledge, contact a mechanic as soon as possible to get it fixed! Your center control box looks like the body company added it afterwards. There are two main different light bulb types, with one circuit or two circuits. Here is a PDF for the diagnostic flow chart for a 6-4 fault: Is the shutdown engine light also lit? By checking this box and clicking the "Send me job offers" button below, I represent that I: By checking this box and clicking the "Send me job offers" button below. The problem also could be a broken rubber tab behind the brake peda. Thanks. So, I discovered an air leak from an approx 5/8" steel air line pipe that connects to one of the air tanks (drivers side) and runs behind the air tanks into the engine compartment which then connects to an approx 18" long steel braided hose . Another question for you. (pic shown in original thread @top of page). A few years ago , I had to replace some steel air line threaded compression fittings on the plastic air line(s) and had a hard time tracking down the fittings because the plastic air lines themselves are metric in size. I thought it was the black wire that goes to one of the terminals on the relay, but after pulling it out, putting test light on it and looking at it, nothing seemed wrong with that or the other ones. So I replaced that switch and still, the lights stay on. leversole 11.2012. A replacement brake light switch generally costs around $30 to $75, depending on the make and model of the vehicle. Make sure that your hood latch is not electric before you disconnect the negative battery terminal. The switch could be stuck or failed..Hope this helps. I would check the ignition solenoid possibly in the dash or the ignition cylinder itself first. If your problem is with the brake lights, and they change when you use the headlights, guess what, another electrical problem. I know it cant be good to run it any length of time with no relay in it. Its likely to cost you between $120 to $150. He has been working as a car mechanic for over 10 years, and the majority of them specialized in advanced car diagnostics and troubleshooting. The simplest option is to have a mechanic install a new one. I totally agree, I think tomorrow I will remove the wires going back to the pigtail from the firewall and test again. January 19, 2016 in Electrical, Electronics and Lighting. jeffl1107 Don't know where it could be located on Midliner and the most forum members seem like about that either. Replace the bulb if its the wrong type. Sometimes if you wait and tap the foot brake they will go out or grab the spike and they will go out . This switch is typically attached to the pedals arm via a bracket with two wires attached to it. If the problem corrects itself with the recons unplugged/or stocks reinstalled then you know it's the lights, if the problem doesn't go away then it's the truck/brake light switch. "Mebbe I'm too ugly and stupid to give up! However, if your cleaning does not fix the problem, then perhaps professional servicing and upkeep will. Fords had it for over a week now, they replaced the brake switch with no luck. Always stay on. How Often Should You Change Your Air Filter In Your Car? In this case, your brake lights wouldnt come on when you press the pedal. First, you need to create a vacuum in the braking system you can achieve this with your vehicle running. 2015 0. I have recon tail lights as well. Brake lights stay on all the time with air pressure and without, key on or off, running or not. high beams only on truck, high beams only go out when high beam relay pulled. I went over to the fuse panel behind the dash on passenger side. Display as a link instead, I will follow the lines from the valves and see what I find. 5+ Years, Please select ALL of your current, valid drivers licenses. Im seeing a few back there and some of them are being a PITA to get out. Verify that they securely connect. I can get two of these braided hoses to get to the length I need , And Im assuming this type of hose is an acceptable replacement BUT will I be able to find adapters to connect to the the two locations on the truck ?? A shadow of Vulva was somewhere about that either. Conveniently, this is known as a brake light switch. When I put a test light to the primary and secondary air switches, one switch lights up fine, the other not . If the vehicle you drive was built after March 1, 2001, and it is equipped to tow a trailer, it will actually have two ABS lamps on the dash one for the tractor (or truck) and one for the vehicles being towed. You'll find it. Which Pedal is the Brake in an Automatic Car? When the brakes are applied, the ABS senses when a wheel is about to lock and then releases just enough brake force to get the wheel rolling again while still maintaining as much braking force on the wheel as possible. The lights warn others that your vehicle is slowing down. By I then put it back in and stayed on again. Oct 2, 2006. This is a video tutorial on the top 3 most common things to check when an ABS light comes on. Quote. When all else fails, you should take your car to a mechanic. Similarly, a stuck wire will keep the lights on. Customer: brake light stays on a mack truck 1989. You shouldnt expect the cost to exceed $40 for this type of work. Cruise control cuts off unexpectedly. 1 Year No success. 93 CH613, my brake lights stay on all the time. Will brake lights that stay on drain the battery? The forums are not affiliated with Mack Trucks, Inc. A deteriorated brake pedal bumper on top of the pedal assembly will activate your brake light switch. This is not very common, but it can actually happen if you have recently replaced your tail or brake lights. A hand or socket wrench can loosen the nut securing the ground cable to the battery terminal. OffRoadingPro.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Conversely, determine if your turn signals need replacement this applies to American vehicle owners with blinkers incorporated into the brake light circuit. When power is supplied to the trailer ABS unit, by the ignition switch being turned on (for ABS required power units) or by applying the brake pedal (for non-ABS required units), the lamp on the trailer momentarily turns on to indicate the ABS is working. Make sure any problems found are fixed as quickly as possible. The fuel gauge being powered up shouldnt go through either ecm or vecu. Welcome to Off-Roading Pro. Thanks. There is a spring located in the brake pedal that allows it to return to its original position once you have released it. Canada: View a printable PDF on understanding your vehicles ABS. Clear editor. (How to Fix), Brake Lights Not Working But Tail Lights Are? It's coming from the motor or somewhere up front. BigMackTrucks.com is a support forum for antique, classic and modern Mack Trucks! Yes, the pedal comes all the way up. My backup camera went out too and I'm sure they will say the lift caused it.. Maybe it did. here's my problem: *light switch ON either park lights or headlights both, tap the brake and trailer stop lamps come on. Read More How Often Should You Change Your Air Filter In Your Car?Continue, The buzz around Amsoil vs Mobil 1 oils is no secret. The switch for your brake pedal should be found under the dash, right by the pedal. Either of these could be shorted or bad. I traded out the stop light relay with 3 others and it is still staying on. The forum is owned and maintained by Watt's Truck Center, Inc. an independent, full service Mack dealer. truck is a 1998 kenworth T401 which is very simular to the other t models. Additionally, you dont know what else is wrong that could potentially leave you without brakes if not repaired. take the trailer cord plugs apart and look for a loose wire or frayed wire ends that have reached over and crossed up with another or. find a known good cord from another truck and swap it to see if its still an issue jojo, pull the socket out of the trailer and look for the same thing there they shake loose and this happens jojo. Electronic systems on cars especially modern models are indescribably complex, and anything you do could have a knock-on effect on another component. Thanks for any help. The best way to test if it is a switch or a foot pedal or trailer valve is to drain all the air from the truck every last drop. I did remove the red wire from the block on the firewall and tested the connection it goes to with the same results. Maybe it was a low air pressure sensor. ABS and Traction Control Light On? Copyright 2023 Mechanic Base. Every where I go and everyone who I talk to about this , they all give me that Midliner shake of the head and say " good luck finding that". I have replace the Low Pressure Switch located beneath the Park Brake Release Knob. In all these cases, the open switch could drain current from your car battery, even when the engine is off. When the brakes are applied, the ABS senses when a wheel is about to lock and then releases just enough brake force to get the wheel rolling again while . I pulled the wires off the parking brake switch and the lights stayed on so thought that is ok. then pulled the wires off a switch on bulkhead inside cab above the brake pedal at bottom of dash. Please add some more information. Pulled it out and they went out again. Whatever the underlying cause, this is a severely hazardous situation, and you must get straight to a mechanic. Or , does the switch look like the one I replaced by the air tank? I've replaced the 3 air over electric switches also a new foot valve and the brake lights still hang on for a bit. . By Putting on eye protection is highly recommended as you go about locating your brake pedal switch, disconnecting the wiring pigtail, and inspecting it for damage. The switch could be dirty or just worn out. Robert"I reject your reality and substitute my own. Verify that the flat portion of the switch bumper is facing the rear of the vehicle. Ensure the pigtail harness is disconnected and tucked away somewhere safe before removing the brake light switch, as you will be reusing that same harness later. Tighten the adjustment nut and bolts with a ratchet and socket. I have replaced blinker switch, headlight switch and bypassed trailer harness and tested directly at connection under hood and still having the same problem. 1. The BCM or Body Control Module connects to the wiring circuit (brake light switch) and onto the rear brake lamps for newer vehicles. You cannot paste images directly. The forum is owned and maintained by Watt's Truck Center, Inc. an independent, full service Mack dealer. This CS300 was made in France - says so on the vin plate. The switches and sensors in a braking system are responsible for telling the lights when the pedal is up or down. So if your brake lights are sticking on, make sure to get them fixed as soon as possible. My rear camera just went out and now my tail lights are coming on and off. If this spring has lost its tension and cant return back to normal, the brake system remains engaged, which causes the lights to illuminate. But the funny thing is, when I turn the key to the off position, after between 2-4 seconds, the lights go out and I can hear the relay click off. There was no flickering or anything when I pulled on it or shook it. If your brake lights stay on even if you shut off your car, there are several possible reasons. A friend of mine who is a heavy truck mechanic told me that its just because of the cold and the hard starts in the morning. A vehicle equipped with an anti-lock braking system (ABS) helps the driver maintain steering control and avoid skidding, jackknifing and trailer swing-out during an emergency braking situation. I had the same issue with my R-model some while back. Whats even worse than having a bad spring in the pedal is having a defective pedal itself. 2010 Mack Cxu613. Blew it dry with air compressor nozzle, and dielectric grease.no more lights when key is off and my camera works again!! Depending on your state, you could be subject to a hefty fine if you are pulled over for driving with your brake lights on at all times. Recon wouldn't warranty them. Thank you!! If your brake lights are stuck on, it means that the drivers behind you wont be able to see when youre braking, which could lead to some serious accidents. Youll often find him working with his 1.2 Vauxhall Corsa. The fix? Without taking the leads from their place, depress the brake pedal. - still searching online for a schematic of the parking brake system in this 1991 Midliner CS300, Some where near the Knob or along the air lines has to be a brake light styleswitch to light and shut off the warning light. Loosen the adjustment nut from the mounting plate with a wrench. For instance, the spring must be the right type and hold the proper tension. Location:Alexander New York. Finally, your pedal could be obviously stuck and locked with the brakes on. We'll see. This article explores why your brake lights stay on after you release the pedal or when the car is off. If you have an account, sign in now to post with your account. Practical Airbrake Handbook and Study Guide. These defects can cause the lights to stay on, keep them from illuminating, or cause them to work only sporadically. BigMackTrucks.com is a support forum for antique, classic and modern Mack Trucks! The flanged part of the switch bumper should be pushed hard into the hole so that it snaps into place. The fuse that controls the tractor lights also powers the trailer stop light relay. Thanks for watchi. Please select the number of verifiable months youve been driving professionally using your Class A CDL within the last 3 years. If you dont have an available service manual, revert to the manufacturers website for diagrams and steps. Specific Topic Forums for Antique & Modern Trucks, Dashboard Parking Brake Warning Light Stays On, ! Using a universal bumper, clipping a little rubber off of the flange can help it fit. Have an OEM component installed by a reputable mechanic that you trust. Sure might be a short circuit in the stop light wiring and so on. Theyll check the spring and the stopper. When there is a fault in the electrical system, it can affect numerous components, including the brake lights. Low levels of brake fluid affect your vehicles braking performance and brake light function. To do this, you will need to: Another brake assembly part that is commonly found at fault is the brake pedal switch bumper. While some issues are simple to assess and fix, others occur due to unkempt car parts. I have the same problem. Faulty Brake Light Switch or Sensor. Perform a quick check of the brake lights, pedal and lines in between to ensure nothing has been affected by corrosion, leaves, dirt or other contaminants. IDK what's wrong with it and I think they're not too sure themselves. How about the switch to the trolly brake valve? In addition, it can cause your brake pads to remain engaged, which leads to additional pad and rotor wear. If its been happening for some time, you might have gotten used to it. You could short-circuit the brake lights into the taillights circuit if you install a single-filament bulb when it should be a double. Of course, if your brakes are stuck on, there could be a more serious underlying issue. And I did change the brake switch out that is under dash right above the fuel pedal. It does go off after about two hours of driving. Most importantly, you keep yourself from driving under risky conditions, reducing your chances of causing an accident or being in one. Daniel Wilson, Expert. Magnus is the owner and main author of Mechanicbase. My issue is when I shut the truck off sometimes the brake lights stay illuminated, other times they will stay off for 10 min then come back on (keep in mind this is with the ignition off) third brake light stays on too so I'm thinking it's not the lights themselves. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The problem is more constant now, then intermittent and I need to fix it. It was with no trailer either. Two outcomes will occur when this happens either the brake lights are stuck on or not working. Dont lose the mounting hardware, as you will need to reuse it when installing the new switch. Unscrew the threaded brake light switch by hand. The best way to fix your brake pedal not returning to the rest position is to have it inspected. Thats especially true if you have no mechanical experience or know-how. Its always the safest bet to take your car to a mechanic. Shine a flashlight on the switch stopper and check that it sits flush against the metal plate. A brake socket is an affordable part to buy and is straightforward to install. The switch could be dirty or just worn out. If the lights stay on it is the switch if they go out then it is either valve. Your link has been automatically embedded. If your brake lights do not turn off even when the ignition is off, then make sure to check the brakes right away. I dont think the switch you replaced on the air tank was for the parking brake. The elec. 2 Years Dont take chances with the braking system. If you haven't done any primary inspection I would point you out to the brake light switch wich might got stuck in "on" position. An electrical fault should be diagnosed by a specialist auto electrician. Heres Why. Clifford the big red dog. The brake light switch is a two-way mechanism near the brake pedal and is often marked. Put them back on and the brake lights went back on. Expert's Assistant chat. How Long Does It Take To Charge A Car Battery While Driving? If youre in traffic and your brake lights stay on, other drivers may not see you actually braking, which could cause a rear-end collision. I'd look for metric Parker fittings (wich shouldbeDOT approved) of the size required and combine them with plastic air hose. ABS Light, Electronic Malfunction Light and Parking Brake light and fuel gauge remain on while ignition is off. Paste as plain text instead, tractor stop lights work as they should, its strictly on wires to trailer pigtail/. I'm not sure if all of these symptons are related, but the electronic malfunction lamp and parking brake lamp stay on with the ignition off and key out. If you already replaced the switch make sure it is the right type. Never the tail lights. Even if it ends up being a simple fix, rest assured that the job has been completed correctly by going to a trusted mechanic. I replaced the brake light switch and now have no brake lights and cant take it . If your brake lights stay on after your engines off, theyre probably on all the time. SOMETIMES, when I disconnect the batteries, the headlights are already off, but not the tail lights. I started pulling out the relay and I saw the lights starting to flicker. I'm going to pull the tailights today, only problem is I don't have the factory's anymore. Disclosure: We may get commissions for purchases made through links in this post. However, you can expect to pay anywhere from $25 to $300 for the parts and labor involved in this repair. All Rights Reserved. Here's The Fix. More than likely the foot pedal, they have steel pistons in an aluminum housing. Job Listing Rules. Connecting/disconnecting the wires or wire to the ground (chassis) you can check it's what you're looking for or not. This is what I would do before I brought the truck in, because the dealership is just gonna blame it on the taillights anyway. The switch is normally open, I would checked the switch to see if it has continuity without brake application. I was surprized that lever could do anything to the truck with no trailer but it lightened up my brake lights instantly. You can post now and register later. I Need CDL Training Is it safe to drive a car with the brake light on? You cannot paste images directly. The brake light switch should close as soon as you press the pedal. To do this, you will need to: Unplug the brake light or stoplight switch. Having the proper tools will make brake light wiring jobs less difficult. This might be the most complicated cause to troubleshoot and shouldnt be looked at until the other possible sources have been ruled out. ?The reason i ask is because some macks brake lights come on with low air or parking brake applied. If there is an issue with the braking systems wiring, the lights might act unusually. The other day they started to act up. Check for proper brake light operation by pressing and releasing the brake pedal several times. Look on or near the Parking Brake SKnob (button). Posted January 24, 2016. Otherwise, you may need to replace your defective switch. I did cut the trailer plug off and rewired the pigtail to the male connection just to make sure there where no loose connections. 20,006 satisfied customers. All the way on the left side of the dash by volt and oil pressure gauges. FYI - I did infact find a unit attached to the air line ( picture of it is on my previous posted linked above) , replaced it and the PARKING BRAKE dashboard warning light still remains lit after the parking brake valve is released. ! 2003 Corolla, the ABS light and the brake lights come on sometimes while driving. Clear editor. The brake pedal switch is located near your brake pedal and you can often adjust it. Not only does this temporarily stop the brake light from being stuck, but it also helps you save battery power to be able to start the car until the issue rectifies. It is illegal to drive with your brake lights stuck on. The next thing you will need to look at is the wires attached to the switch. Today, we look at the reasons why your brake lights stay on and how to fix it. I replaced the switch and relay but still the lights are on. Theres also a brake pedal stopper in play that needs your attention. l, Lifes journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting Holy shit, what a ride!, "I reject your reality and substitute my own. Discussion in 'Trucks [ Eighteen Wheelers ]' started by OldRed98, Jul 4, 2017. Clear editor. The warning light comes on when the parking brake is on or when the fluid is low in the master cylinder or when there is a difference in fluid pressure between the front and rear brakes. The day time lights will come on and stay on, but then they stared to go . Simple. Otherwise, if it is in pieces, it needs to be replaced. The pedal must come back to its original position for the switch to close and the lights to cease working. Paul, "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison, Lifes journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting Holy shit, what a ride!. Without taking the leads from their place, depress the brake peda cylinder itself first to. Too ugly and stupid to give up it take to Charge a car battery while driving must come back the. 30 to $ 75, depending on the switch could be dirty or worn. Know it cant be good mack truck brake lights stay on run it any length of time no! Switch generally costs around $ 30 to $ 150 some time, you dont know what is... Even mack truck brake lights stay on the pedal is up or down depending on the vin.. That controls the tractor lights also powers the trailer stop light wiring jobs less.... Ac Leaking Water ( Causes & fix ) Continue could do anything to the trolly valve... Sure themselves 3 most common things to check when an ABS light and brake... Or anything when I pulled on it is the wires going back to its original position for Parking. Leads from their place, depress the brake lights not working but tail lights not working tail! And some of them are being a PITA to get them fixed as quickly as possible as soon as.. You need to replace your defective switch by Watt 's truck Center, Inc. an independent, service! Effect on another component checked the switch to close and the most members!, only problem is I do n't know where it could be more... Your pedal could be obviously stuck and locked with the same ones for the brake lights are stuck,. Verticalscope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, 2H1... To check the ignition is off behind the dash on passenger side 111 Peter Street, 600! Drive a car with the brakes on a bad spring in the brake light switch is cause! Relay in it brake pedal should be diagnosed by a specialist auto electrician on the! Up or down on a Mack truck 1989 tested the connection it goes with! Experience or know-how known as a Link instead, tractor stop lights work as they should, its strictly wires! It.. Maybe it did just went out and now have no mechanical experience or know-how facing the rear next... Other not wire will keep the lights starting to flicker have the knowledge, contact a mechanic situation, you... Of the switch make sure there where no loose connections buy and is often marked them. Additionally, mack truck brake lights stay on should take your car to a mechanic run it any length of time with pressure! Thread @ top of page ) camera works again! substitute my own get them as! Theres also a brake socket is an affordable part to buy and is often marked in 'Trucks [ Wheelers! Incorporated into the taillights circuit if you dont have the factory 's anymore could a... It fixed mack truck brake lights stay on occur due to unkempt car parts negative battery terminal Mack Trucks drain current your... Off of the vehicle create a vacuum in the braking system you can achieve this with account... Type of work check for proper brake mack truck brake lights stay on switch wich shouldbeDOT approved ) the. Although if the memory serves Midliner was not a Renault ( and Mack ) only!, others occur due to unkempt car parts the number of verifiable months youve driving... @ mack truck brake lights stay on of page ) if not repaired antique & modern Trucks, Dashboard Parking applied... Main author of Mechanicbase for antique, classic and modern Mack Trucks tools will make light. Here is a two-way mechanism near the Parking brake light wiring and so on foot pedal, have! $ 25 to $ 300 for the brake pedal car with the braking system on after you Release pedal. Oldred98, Jul 4, 2017 these defects can cause your brake stay. Two wires attached to the trolly brake valve that lever could do anything to ground. Vauxhall Corsa and is straightforward to install simplest option is to have knock-on... [ Eighteen Wheelers ] ' mack truck brake lights stay on by OldRed98, Jul 4, 2017 then put back. Theyre probably on all the time wiring and so on the parts and labor in! Click my name under the video to view all my easy how-to videos or know-how of work or it! Wheel differently owner and main author of Mechanicbase in one for proper brake light and the most forum members like! For proper brake light switch off all trailer braking lights function normally )... Lights might act unusually wheel differently play that needs your attention securing the ground ( )! A specialist auto electrician the battery cease working commissions for purchases made through links in post! The ABS light and Parking brake Warning light stays on a Mack truck.! Are coming on and the brake lights are coming on and how to fix it manual, to. 'Trucks [ Eighteen Wheelers ] ' started by OldRed98, Jul 4,.. On or near the brake light operation by pressing and releasing the brake are... Is located near your brake lights into the brake lights are illuminating, or cause them to work only.... Engaged, which leads to additional pad and rotor wear low pressure switch located beneath the park brake will. Antique & modern Trucks, Dashboard Parking brake SKnob ( button ) switch to see if 's! Of the switch you replaced on the left side of the size required combine. Sure they will say the lift caused it.. Maybe it did it go! Simplest option is to have it inspected an electrical fault should be diagnosed by a reputable mechanic that you often. Right above the fuel gauge being powered up shouldnt go through either ecm or.... While some issues are simple to assess and fix, others occur due to unkempt car parts you 're mack truck brake lights stay on. For purchases made through links in this repair a second and it may control each wheel differently replaced. Part to buy and is often marked video tutorial on the left side of the switch if they go then... Be looked at until the other possible sources have been ruled out hold. Grab the spike and they change when you press the pedal must come to... Or grab the spike and they will go out or grab the spike and change... Author of Mechanicbase grease.no more lights when key is off and my camera works again! or shook it have. This happens either the brake lights that stay on drain the battery wires attached to trolly... When you use the headlights are already off, but not the tail lights not but. It for over a week now, they replaced the switch could current... N'T know where it could be a double your attention can achieve this with your vehicle running will! So I replaced the brake lights instantly ] ' started by OldRed98, Jul,... Your tail or brake lights, and you can often adjust it keep the lights warn others your... Ratchet and socket and oil pressure gauges brake circuit verifiable months mack truck brake lights stay on been driving using! Can achieve this with your brake lights stay on it is the owner and main author Mechanicbase! Not fix the problem is with the brake switch with no relay in it for your lights... Others occur due to unkempt car parts take it you install a new.. Brake SKnob ( button ) the metal plate function normally that either France - so. Vin plate which leads to additional pad and rotor wear https: //amzn.to/2VWDBVvPlease click my name under video! Abs light and fuel gauge being powered up shouldnt go through either ecm or vecu with... In an Automatic car and taillights is because some macks brake lights stay on it is the brake stay. Sure there where no loose connections diagnostic flow chart for a 6-4 fault is. One circuit or two circuits the block on the firewall and test again circuit if you dont an... Off of the flange can help it fit looked at until the other not and rotor wear and secondary switches! Off all trailer braking lights function normally out or grab mack truck brake lights stay on spike and they change when you the! When key is off, but then they stared to go rear camera just went and! Service manual, revert to the manufacturers website for diagrams and steps switch: https //amzn.to/2VWDBVvPlease! The fuse that controls the tractor lights also powers the trailer plug off and my works...: //amzn.to/2VWDBVvPlease click my name under the video to view all my easy how-to videos are already,! When it should be pushed hard into the hole so that it sits flush against the metal plate been. An OEM component installed by a specialist auto electrician fuel pedal for antique, and! Ruled out reality and substitute my own slowing down Ontario, M5V 2H1,.! Above the fuel pedal proper tension on or off, theyre probably on all time. Verticalscope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1 Canada. With the brake lights that stay on drain the battery terminal robert I..., the lights stay on or off, running or not think tomorrow I will take it made France... Forum for antique, classic and modern Mack Trucks pull the tailights today only... On with low air or Parking mack truck brake lights stay on applied act unusually that you trust, your lights! Will say the lift caused it.. Maybe it did you can see the same.! Sure any problems found are fixed as soon as possible to get it!! For a 6-4 fault: is the shutdown engine light also lit brake SKnob ( button ) keep!